I'm not sure it's even possible to do all the quests in one go without new game +. I'm thinking of The Wimpy Thugling, Seeing Double, and probably some other ones here. I dunno if you can fulfill all the requirements needed to trigger every quest in a single game.
I decided to do a normal playthrough using mostly your path on the Jumi arc with a new game. I've never plowed through the game like that before, so I was actually underleveled for once. My placement of artifacts also probably jacked up the monster levels, since I didn't pay too much attention to where I stuck stuff. I used a 2H sword instead of a 1H sword(because I love the 2H STs). 2H is much slower so enemies have more opportunities to hit you, making fights slower and sometimes harder(Axebeaks took FOREVER), but it makes up for it with power. And I LOVE Shish Kebob.
So I was only level 20-something by the time I got to the Bejeweled City, and the bosses there were 31. I died once on Iron Centaur in Leires, but on the way back down I got a Braveblade, which is a 2H sword dropped by one of the monsters there. I wasn't really speeding through, and was about 5 hours in by the time I got the Sword of Mana. And this was starting up again after almost a year of not playing it. XD
Another thing I did different to your path was one quest, The Wisdom of Gaeus, to get the ForbiddenRing, which is otherwise unnecessary, but I use the ring to experience share with the monsters I train. No biggie.
I decided to do a normal playthrough using mostly your path on the Jumi arc with a new game. I've never plowed through the game like that before, so I was actually underleveled for once. My placement of artifacts also probably jacked up the monster levels, since I didn't pay too much attention to where I stuck stuff. I used a 2H sword instead of a 1H sword(because I love the 2H STs). 2H is much slower so enemies have more opportunities to hit you, making fights slower and sometimes harder(Axebeaks took FOREVER), but it makes up for it with power. And I LOVE Shish Kebob.
So I was only level 20-something by the time I got to the Bejeweled City, and the bosses there were 31. I died once on Iron Centaur in Leires, but on the way back down I got a Braveblade, which is a 2H sword dropped by one of the monsters there. I wasn't really speeding through, and was about 5 hours in by the time I got the Sword of Mana. And this was starting up again after almost a year of not playing it. XD
Another thing I did different to your path was one quest, The Wisdom of Gaeus, to get the ForbiddenRing, which is otherwise unnecessary, but I use the ring to experience share with the monsters I train. No biggie.